First off, please don't take anything I say seriously or as financial advice. As always, this is on opinion based basis. That being said, PFE recently came out with news that they are working towards a Covid19 vaccine by October. They were already on a mostly bullish run until recently. That being said, the chart patterns were already indicating positive. The fact that they didn't rally and sentiment analysis didn't push it the same way Moderna did when it came with similar news stories, leads me to believe that today was obviously a bad day in general for the stock market.
